Physical Quantities & Units
This is the S.I unit for length or distance.
What is the metre (m)?
It is a quantity represented by the gradient of a distance-time graph.
What is speed?
It is the tendency of a body to resist changes to its state of rest or state of motion.
What is inertia?
It is push or a pull.
What is a force?
It is the turning effect of a force.
What is a moment?
It means you multiply the quantity by 10-6.
What does the prefix 'micro' mean?
It is a quantity measured by the area under a speed-time graph?
What is distance?
It is also known as the Law of Inertia.
What is Newton's First Law of Motion also known as?
It is the Newton.
What is the S.I. unit of force?
It is the quantity that force is multiplied by to calculate the moment of the force about a pivot.
What is perpendicular distance from the pivot to the line of action of force?
It is a SI unit of temperature.
What is the Kelvin (K)?
It is the kinematic equation of motion that excludes the quantity "s" (displacement).
What is v = u + at?
What is Newton's Third Law of Motion?
It is Fnet = ma.
What is the mathematical formula for Newton's Second Law?
It is the point on a body that is fixed.
It can be taken to be any point on the body if the body is in equilibrium.
What is the pivot?
It is the unit for both work done and energy.
What is the Joule (J)?
It is the kinematic equation of motion that excludes the quantity, v (final velocity).
What is s = ut + 0.5at2?
The body will continue to move at constant speed in a straight line.
What happens to a moving body if no net/resultant force acts on it?
The resultant acceleration on a body of mass 4 kg if forward force on the body is 10 N and backward force is 4 N.
What is 1.5 m/s2 ?
It can only be applied to bodies in equilibrium.
What bodies can the Principle of Moments be applied to?
It is instrument that can measure length to a precision of 0.01mm.
What is a micrometer screw gauge?
It is that the acceleration remains constant throughout the motion.
What is the condition that must be fulfilled in order to use the kinematic equations of motion?
The body will accelerate in the same direction as its motion.
What happens when a moving body experiences a net force on it?
The forward force required to push a body of mass 10 kg to produce an acceleration of 2 m/s2 while a frictional force of 1N opposes motion.
What is 21 N?
It is a pair of forces - equal in magnitude, opposite in direction and whose lines of action do not coincide.
What is a couple?